// Copyright (c) 2016-2018 Khronos Group. This work is licensed under a
// Creative Commons Attribution 4.0 International License; see
// http://creativecommons.org/licenses/by/4.0/

include::meta/VK_KHR_external_fence_fd.txt[]

*Last Modified Date*::
    2017-05-08
*IP Status*::
    No known IP claims.
*Contributors*::
  - Jesse Hall, Google
  - James Jones, NVIDIA
  - Jeff Juliano, NVIDIA
  - Cass Everitt, Oculus
  - Contributors to `<<VK_KHR_external_semaphore_fd>>`

An application using external memory may wish to synchronize access to that
memory using fences.
This extension enables an application to export fence payload to and import
fence payload from POSIX file descriptors.

=== New Object Types

None.

=== New Enum Constants

  * ename:VK_STRUCTURE_TYPE_IMPORT_FENCE_FD_INFO_KHR
  * ename:VK_STRUCTURE_TYPE_FENCE_GET_FD_INFO_KHR

=== New Enums

None.

=== New Structs

  * slink:VkImportFenceFdInfoKHR
  * slink:VkFenceGetFdInfoKHR

=== New Functions

  * flink:vkImportFenceFdKHR
  * flink:vkGetFenceFdKHR

=== Issues

This extension borrows concepts, semantics, and language from
`<<VK_KHR_external_semaphore_fd>>`.
That extension's issues apply equally to this extension.